Viscose and cuprammonium cellulose spinning solutions and products thereof



Patented Nov. 19, 1935 UNITED ES 2,021,849 vrscoss AND oUraAMMomoM CELLULOSE SPINNING SOLUTIONS THEREOF Rudolph S. Bley,

North American AND PRODUCTS Elizabethton, Tenn, assignor to Rayon Corporation,

New

York, N. Y., a corporation of Delaware No Drawing. Application September 8, 1934, Serial No. 743,301

10 Claims.

The present invention relates to the production of soft-lustre cellulosic products, such as filaments, yarns, ribbons, films, etc., from viscose and cuprammonium cellulose solutions.

One object of my invention has to do with the emulsification of an alkyl-naphthalenehaving the structure C10H7.(R) x in which R represents an alkyl group-with a cellulosic spinning solution to produce, after extrusion into conventional spinning baths, soft-lustre products of pleasing hand.

Another object of my invention relates to the incorporation of a phenyl-naphthalene-having the structure C10H7.(R1) x in which R1 represents a phenyl group-into cellulosic spinning solutions for the manufacture of soft-lustre products.

Other objects of my invention will become apparent to thOSe skilled in the art after a study of the following specification. 2 I am well aware that it has, heretofore, been proposed to disperse hydronaphthalenes and halogenated naphthalenes in cellulosic spinning solutions with a view of. obtaining delustered filaments. However, it has been found that hydro- 2 naphthalenes evaporate too rapidly from the extruded filaments, and that halogenated naphthalenes, such as I-Ialowax, are rather unstable in combination with cellulosic products, this being probably due to their chlorine content. These de- 30 ficiencies, however, are unexpectedly overcome by uniformly distributing and/or emulsifying highboiling alkyland phenyl naphthalenes in viscose and cuprammonium cellulose solutions. The following table will serve to ilustrate the physical 35 characteristics of some naphthalene derivatives suitable as delustering agents, although I wish to emphasize that my process is not limited to these compounds. Any alkyland phenyl-derivative of naphthalene, which is substantially waterand alkali-insoluble, colorless and resistant to the attack by acidic spinning baths, may be used to modify the lustre of viscose and cuprammonium cellulose products. In order to prevent rapid evaporation from the extruded products, I prefer to use alkyland phenyl-naphthalenes boiling above 100 C. The amounts of these derivatives may be varied within wide limits, although an addition of about 1 to 10% is generally sufiicient to deluster the aforementioned cellulosic products, these percentages being calculated on the cellulose content of the solutions.

After thoroughly emulsifying the naphthalene derivative with the spinning solution, it. is spun in conventional manner into setting baths. Finely divided pigments, such as titanium dioxide, etc.,

may be dispersed in an alkylor phenyl-naphthalene to form an organosol. Subsequently this organosol may be emulsified with a spinning solution to modify the lustre of the finished products.

I wish to emphasize that the compounds as well 5 as the proportions, set forth above, may be varied to a large extent without departing from the spirit and scope of my invention.

I claim:

1. A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and an ethyl-naphthalene.

2. A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and about 1 to of an ethyl-naphthalene, said percentages being calculated on the cellulose content of said solution.

3. A soft-lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing an alkyl-naphthalene. I 4. A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and an alkyl-napthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure CmHMRM in which R represents an alkyl group.

5; A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and a dialkyl-naphthalene, said .naphthalene being substantially waterand alkali-in- 55 soluble and having a boiling point above 100 C.

6. A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and about 1 to 10% of an alkyl-naphthal'ene, said naphthalene being substantially water and. alkali-insoluble, having a boiling point above 100 C. and the structure C1oH'7.(R)m in which R represents an alkyl group and said percentages being calculated on the cellulose content of the solution.

7. A spinning solution for the manufacture of soft-lustre products comprising a solution of the group consisting of viscose and cuprammonium cellulose and about 1 to 10% of a dialkyl-naphgown thalene, said naphthalene being substantially wa= terand alkali-insoluble and having a boiling point above 100 C. and said percentages being calculated on the cellulose content of the solution.

8. A soft-lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing a dialkyl-naphthalene.

9. A soft-lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing an ethyl-naphthalene.

10. A soft-lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing a butyl-naphthalene.

' RUDOLPH S. BLEY. 

